Pith Number

pith:YAL4F6OF

pith:2017:YAL4F6OFU74CPMDAYB5N7XAGV4

not attested not anchored not stored refs pending

The complex social network of surnames: A comparison between Brazil and Portugal

G. D. Ferreira, G. M. Viswanathan, H. J. Herrmann, L. R. da Silva

arxiv:1705.05449 v1 · 2017-05-12 · physics.soc-ph · cs.SI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YAL4F6OFU74CPMDAYB5N7XAGV4}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:44:22.714306Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c017c2f9c5a7f827b060c07adfdc06af2b31fcb28727ccfae6625d3260dc6471

Aliases

arxiv: 1705.05449 · arxiv_version: 1705.05449v1 · doi: 10.48550/arxiv.1705.05449 · pith_short_12: YAL4F6OFU74C · pith_short_16: YAL4F6OFU74CPMDA · pith_short_8: YAL4F6OF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YAL4F6OFU74CPMDAYB5N7XAGV4 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c017c2f9c5a7f827b060c07adfdc06af2b31fcb28727ccfae6625d3260dc6471

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13e3e9b7f2a576fb7c8d9d2fc0bbe35c4048833301c491b53801e0ad01839697",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2017-05-12T17:28:28Z",
    "title_canon_sha256": "d3a242e71b6533069ca961a1a2386ca01bc0cff4f74e77f6c1ab2c8de0bb60f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.05449",
    "kind": "arxiv",
    "version": 1
  }
}